Magazine of Civil Engineering, No.4(64), 2016


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Analysis of normal operation of a rockfill dam with combination of seepage-control elements: reinforced concrete face and clay-cement-concrete wall

M.P. Sainov
Analysis of normal operation of a rockfill dam with combination of seepage-control elements: reinforced concrete face and clay-cement-concrete wall

The paper considers results of stress-strain state analysis for a 87 m high rockfill dam that is located in the layer of soil foundation and has a combined seepage-control element. In the lower part of the dam as well as in its foundation there is fixed a grout curtain by using slurry trench cut-off walls, and in the upper part there is fixed a reinforced concrete face.
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Thermophysical field testing of residential buildings made of autoclaved aerated concrete blocks

S.V. Korniyenko, N.I. Vatin, A.S. Gorshkov
Thermophysical field testing of residential buildings made of autoclaved aerated concrete blocks

The object of investigation is one-type neighbouring blocks of flats located in Volgograd region (Russia, N 48). Thermophysical field testing using eco-friendly nondestructive test methods was carried out to estimate whether the level of heat protection in buildings meets requirements of the Russian construction norms SP 50.13330.2012.
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STRUCTURES
Fire design of arch-type timber roof

T. Saknite, D. Serdjuks, V. Goremikins, L. Pakrastins, N.I. Vatin
Fire design of arch-type timber roof

Lattice timber structures, which are made of elements connected by punched steel plates, are widely used for residential and industrial buildings. The main types of the structures are trusses, frames, and arches, which enables covering spans up to 30 m and more.
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The stiffness of rigid joints of beam with hollow section column

O.A. Tusnina, A.I. Danilov
The stiffness of rigid joints of beam with hollow section column

At present steel framework based buildings are prevalent in civil engineering. Application of hollow section columns have proven to be efficient in low-rise buildings. In some cases frame joints of beam to column connections are needed in this kind of building structures.
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CALCULATIONS
Analysis of the buckling of spatial truss with cross lattice

M.N. Kirsanov
Analysis of the buckling of spatial truss with cross lattice

The construction of a beam type spatial truss is proposed. The truss consists of three plane trusses with a cross lattice. The supports of the structure are modeled at the four corner points. The simple analytical dependence of the structure deflection on its size, load and a number of panels has been found for the case of an even number of panels.
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Analysis of local stability of the rectangular tubes filled with concrete

R. A. Kanishchev
Analysis of local stability of the rectangular tubes filled with concrete

The use of rectangular steel tubes filled with concrete allows combining the advantages of concrete (reinforced concrete) and steel structures with reciprocal compensation of their disadvantages. Building code Eurocode 4 is used for the design of such structures in the European Union, but the main disadvantage of this standard is its limitations for use of the class 4 rectangular steel cross-sections (classification according to standard EN 1993-1-1) filled with concrete.
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